(19)
(11) EP 0 274 243 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
30.08.1989 Bulletin 1989/35

(43) Date of publication A2:
13.07.1988 Bulletin 1988/28

(21) Application number: 87310916.9

(22) Date of filing: 11.12.1987
(51) International Patent Classification (IPC)4: H03B 5/18
(84) Designated Contracting States:
DE FR GB IT NL

(30) Priority: 05.01.1987 US 477

(71) Applicant: AT&T Corp.
New York, NY 10013-2412 (US)

(72) Inventor:
  • Gonda, Joseph
    Center Harbor New Hampshire 03226 (US)

(74) Representative: Buckley, Christopher Simon Thirsk 
Lucent Technologies, 5 Mornington Road
Woodford Green, Essex IG8 0TU
Woodford Green, Essex IG8 0TU (GB)


(56) References cited: : 
   
       


    (54) Improved oscillator circuit utilizing multiple semiconductor devices


    (57) An improved oscillator circuit (20) utilizing multiple semiconductor devices (21, 22), such as field-effect transistors or bipolar transistors, is disclosed. To improve the gain of the oscillator circuit corresponding terminals on each device are interconnected via a path (23) which provides a delay equal to an integer multiple of the inverse of the oscillator frequency. This technique can be adapted to provide an oscillator whose nominal frequency is voltage controllable and can be arranged to provide one or more output ports.







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